Abstract: A method for detecting a web skimmer on a “Payment Page” relates to a network security, namely, a detection of a malicious code on web pages, which include fields for inputting a payment information and a user personal data, and it may be used to increase a security level in case of making online payments for goods and services. The claimed method checks elements, which are present on the web page, for a presence of the malicious code and determines an activity that is inherent to a web skimmer embedded on the web pages with a payment form, timely informs about a presence of the user characteristics and/or blocks the web page itself and provides security of the operations associated with payment of goods and services via the Internet.